First of all, thanks for your support.
It is not possible, at least not without A LOT of work, to implement polygonal geometry that is driven by Attribute Manger parameters and can maintain vertex-by-vertex manipulations of users.
You must reimplement all its vertex/edge/polygon interactions
OBJECT_POLYGONOBJECT is sort of uncharted territory.
That answers my question. My approach was trying if I could use the already implemented geometry interactions and add from that point. Since I found no example for OBJECT_POLYGONOBJECT, thought that could be it, but seems not.
If you just want to some information being displayed for objects, I would recommend implementing a tag which does that. If you want to, you could hide that tag from the users view, and also write a plugin which automatically distributes that tag in a scene
My plan B was along these lines, with a dialog to show the info.
Thanks,
Oscar